Digital BW, The Print

In the process of getting the new ultratone inkset for my epson 1160 
CIS system, need to make a decision as to getting FS or FSN, unable 
to access www.paulroark.com so cannot find out the exact warmth for 
the FS/FSN. 


So if anyone is using the UT-FS/FSN would you please 
comment on the neutrality of the FS and FSN, more inclined towards FS 
however, becos of issues of lightfastness- no toner, just carbon.